Showing papers in "Marine Chemistry in 2009"

TL;DR: In this paper, water sampling for characterization of chromophoric dissolved organic matter (CDOM) in the coastal South Atlantic Bight was conducted as part of the long term Coastal Ocean Research and Monitoring Program (CORMP).

TL;DR: Amino acids, neutral sugars and amino sugars were analyzed to investigate the chemical composition and diagenetic processing of suspended particulate organic matter (POM, > 100nm), high-molecular-weight dissolved organic matter(HMW DOM, 1-100nm) and low-molesculin-weight (LMW DOM) as discussed by the authors.

TL;DR: Wang et al. as mentioned in this paper analyzed surface sediment samples from a matrix of fifty-five sites covering virtually the entire Bohai Sea (Bohai), China were analyzed for total organic carbon (TOC), total nitrogen (TN), n -alkanes, unresolved complex mixture (UCM), biomarkers and stable carbon isotopic composition ( δ 13 C), and principal component analysis was performed for source identification of organic matter (OM).

TL;DR: Orihel et al. as discussed by the authors studied the methylmercury (MeHg) concentration and production rates in bottom sediments along the mainstem of Chesapeake Bay and on the adjoining continental shelf and slope.

TL;DR: The photoreactivity of chromophoric dissolved organic matter (CDOM) transported to Arctic shelf environments by rivers has only recently been studied and its quantitative role in Arctic shelf biogeochemistry has received little attention as discussed by the authors.

TL;DR: The first data for the artificial sweetener Splenda (Splenda®) for North American coastal and open ocean waters was presented in this paper, where large volume water samples were collected and pre-concentrated using solid phase extraction followed by GC/MS analysis.

TL;DR: In this paper, the bioavailability and bacterial degradation rates of dissolved organic matter (DOM) were determined over a seasonal cycle in Loch Creran (Scotland) by measuring the decrease in dissolved organic carbon (DOC), nitrogen (DON) and phosphorous (DOP) concentrations during long-term laboratory incubations (150 days) at a constant temperature of 14°C.

TL;DR: In this article, the authors report on in situ experiments on single methane and argon bubbles within and above the hydrate stability field (HSF) for depths from 400 to 1500m.

TL;DR: Based upon seven field surveys conducted during April 2005 - April 2008, Wang et al. as mentioned in this paper examined the surface partial pressure of CO2 and dissolved oxygen (DO) in the outer Changjiang (Yangtze River) Estuary, on the inner shelf of the East China Sea (ECS).

TL;DR: In this paper, the distribution and δ 13 C composition of sedimentary n -alkanes (C 14 −C 34 ) were investigated to determine the origins of organic matter in surface sediments in a subtropical, non-riverine dominated coastal shelf.

TL;DR: In this paper, a study of surface-active substances (SAS) in the sea-surface microlayer (SML) of the Santa Barbara Channel suggest that the SML is stable enough to exist at typical oceanic wind conditions and that stratification plays an important role in SML formation.

TL;DR: In this article, an unprecedented number of 666 samples was analyzed for 44 stations along 5 ocean transects. The results showed that dissolved Al concentration in surface layer water (SLW) was very low, close to 1 nM, with the lowest SLW concentrations towards the Canadian part of the Arctic Ocean and higher values adjacent to and in the shelf seas.

TL;DR: Different chemical species of dissolved vanadium, V (IV) and V (V), were measured in the water column of the Long Island Sound (LIS), from the East River to the Atlantic boundary during spring and summer conditions as discussed by the authors.

TL;DR: In this paper, high resolution profiles of trace elements (Fe, Mn, Co, As, Cu, Cr, Ni and Pb) were assessed using the DET and DGT techniques in silty, organically enriched, sub-tidal sediments of the Belgian coast during late winter and spring 2008.

TL;DR: In this paper, the spatial distribution and concentration of exopolysaccharides at 9 discrete sea ice sites, consisting of first year sea ice, and relates this information to physical (ice temperature, texture) and biogeochemical (oxygen stable isotopic composition of the ice, salinity, macronutrients, dissolved iron, particulate organic carbon, dissolved organic carbon and Chlorophyll a) variables.

TL;DR: In this paper, the results of an experiment in which they measured 222 Rn (15,000 observations), CH4 (40, 000 observations), and associated variables in seawater nearly continuously at a coastal site in the Gulf of Mexico for almost two years were reported.

TL;DR: In this paper, the authors conducted density fractionations on sediments from diverse margins (Mexico margin, Gulf of Mexico, Mississippi River delta, Eel River margin) to investigate the nature, provenance and age of organic matter (OM) among density fractions.

TL;DR: Changes in phytoplankton composition and degradation of particulate organic matter (POM) in the northwestern Mediterranean Sea were studied using time-series sediment trap samples collected during the spring of 2003 at the DYFAMED station, and sterol degradation products appeared to be less suited than oxidation products of monounsaturated fatty acids for the precise monitoring of the degradation state of POM.

TL;DR: The geochemical behavior of dissolved trace elements in sediment interstitial waters from the Vigo Ria (Galicia, Spain) has been determined as mentioned in this paper, showing that the metal profiles were affected by sedimentary redox processes, which were monitored by means of Mn and Fe concentrations and pore water pH.

TL;DR: In this paper, the presence of seawater concentrations of chloride and bromide ions enhanced absorbance photobleaching reaction rates by approximately 40% regardless of DOM source or the presence or absence of carbonate ions.

TL;DR: In this paper, an experimental methodology was used based on the differential pulse anodic stripping voltammetric (DPASV) determination of labile copper species by titrating the sample using increments of copper additions uniformly distributed on the logarithmic scale.

TL;DR: In this paper, the authors studied the influence of oxygen, nitrate/nitrite, and sulfide on the activity of denitrifying bacteria in the chemocline of the shallow, brackish Mariager Fjord, by means of incubation experiments with 15N-labeled compounds.

TL;DR: Estimated particulate Cd:P ratios derived from regression slopes of Cd versus PO 4 3− relationships from a global dataset showed a 66-fold difference among seven species grown under identical Fe concentrations, with oceanic diatoms having the highest Cd quotas and prymesiophytes the lowest.

TL;DR: In this paper, a joint analysis of manganese species distributions (dissolved Mn, particulate Mn, and bound Mn) obtained in the Black Sea, the Baltic Sea (Landsort Deep), and Oslo Fjord (Baerumsbassenget), enabled common features to be revealed that demonstrate the similarity in the mechanisms of pelagic redox-layer formation.

TL;DR: In this article, the source and transformation of high-molecular-weight dissolved organic matter (HMW-DOM) in the mixing zone of the Mississippi River plume was examined.

TL;DR: In this article, the origin, composition, and fate of organic matter/HS were assessed by distribution characteristics, elemental and isotopic compositions, and infrared diffuse reflectance spectroscopy (DRIFTS).

TL;DR: The vertical distribution of trace and rare earth elements (REE) was studied in a sediment core from the Vigo Ria (NW Iberian Peninsula) where sedimentation patterns have changed during the last century as mentioned in this paper.

TL;DR: In this article, spatial and temporal changes in the concentration and composition of total dissolved organic carbon (DOC) and dissolved lignin-phenols (sum 8) in surface and bottom waters in estuarine and inner shelf off the Louisiana coast were reported.

TL;DR: In this article, the relative importance of biotic and abiotic degradation processes on marine organic matter was evaluated using suspended particle and surface sediment samples collected in the Northwestern Mediterranean Sea during the MEDFLUX program.

TL;DR: In this article, stable nitrogen isotopic ratios were measured in sinking particles and surface sediments from the South China Sea (SCS) in order to study recent nitrogen sources and degradation.